The BowTech ExtremeVFT Sampson model will be the hardest hitting of the bunch.......with limbs up to 100lbs. The parallel limb style should make it fairly mild to shoot . Once it' s back that is!
Assuming middle of the road with regards to IBO speeds:
The 100# model at 5grs /lb(500gr arrow) should shoot approx 330fps.....that' s 121ft lbs of KE!! Holy sweet mama![8D]
With a 700 gr arrow you are looking at 280+fps and probably closer to 125ft lbs of KE.

The 90# model at 5grs/lb (450gr arrow) should also shoot around 330fps for about 110ft lbs of KE.........translate that to a 700gr arrow and you are looking at about 270 fps and closer to 115 ft lbs of KE.

Obviously speed will go a down a bit as you start adding things to the string but this should give you a ball park starting point. I' d keep the string stuff SIMPLE and as light as possible for big stuff like that.....no sense in putting together a tank killer only to bog it down with a bunch of extra string junk. As Scotty would say," Full power to engines Captain!"
BIG fat extra bored out Tru-Peep " Super Hunter" , no silencers and something light and simple for the nock set (I don' t think I' d care for a string loop on a 100# bow[]) I' d probably shoot off the string with a nice big tied in nock set and an eliminator button underneath. Simple and quick in case you have to shoot in a hurry.

Good luck and get them before they get YOU!